code: def init():
      return jsonify(visualizer.get_insights_config())
  
file_path: captum/captum/insights/attr_vis/server.py
imports: import logging
  import os
  import socket
  import threading
  from time import sleep
  from typing import Optional
  from captum.log import log_usage
  from flask import Flask, jsonify, render_template, request
  from flask_compress import Compress
  from torch import Tensor
label_desc: Use image node_id 4 for calling a global function with example usage: init() and returns: jsonify